My bfly bush (Buddleia Davidii) that I planted last year, never trimmed back, and is now about 6 feet and in bloom has some yellow leaves...Most of the leaves are on last years growth (it seems)..it also doesn't seem to be causing any problems..I have posted a pic of a leave from last week..

Now my rhododendron (olga mezitt) that was planted beside the bfly bush has leaves that are turning bright redish orange...

I've done a search and realized it could be anything from a soil problem to a bug..I see a small amount of leaf damage from something eating the bfly leaves..but not much..I haven't found any bugs at night on it...Other than the red leaves on the rhod..it has no evidence of anything eating it...My camera batteries are dead but I'll try to post a pic of the red leaves tom...

Any suggestions..or just leave alone as the plants don't seem to be in any trouble...Thanks..

Here is a link that might be useful: {{gwi:1178918}}